package com.example.config;

import javax.sql.DataSource;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.boot.web.servlet.FilterRegistrationBean;
import org.springframework.boot.web.servlet.ServletRegistrationBean;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Primary;

import com.alibaba.druid.pool.DruidDataSource;
import com.alibaba.druid.support.http.StatViewServlet;
import com.alibaba.druid.support.http.WebStatFilter;

@Configuration
public class DruidConfiguration {
	private Logger logger = LoggerFactory.getLogger(DruidConfiguration.class);
	 @Value("${spring.datasource.url}")
	    private String dbUrl;
	    
	    @Value("${spring.datasource.username}")
	    private String username;
	    
	    @Value("${spring.datasource.password}")
	    private String password;
	    
	    @Value("${spring.datasource.driver-class-name}")
	    private String driverClassName;
	    
	    @Value("${spring.datasource.initialSize}")
	    private int initialSize;
	    
	    @Value("${spring.datasource.minIdle}")
	    private int minIdle;
	    
	    @Value("${spring.datasource.maxActive}")
	    private int maxActive;
	    
	    @Value("${spring.datasource.maxWait}")
	    private int maxWait;
	    
	    @Value("${spring.datasource.timeBetweenEvictionRunsMillis}")
	    private int timeBetweenEvictionRunsMillis;
	    
	    @Value("${spring.datasource.minEvictableIdleTimeMillis}")
	    private int minEvictableIdleTimeMillis;
	    
	    @Value("${spring.datasource.validationQuery}")
	    private String validationQuery;
	    
	    @Value("${spring.datasource.testWhileIdle}")
	    private boolean testWhileIdle;
	    
	    @Value("${spring.datasource.testOnBorrow}")
	    private boolean testOnBorrow;
	    
	    @Value("${spring.datasource.testOnReturn}")
	    private boolean testOnReturn;
	    
	    @Value("${spring.datasource.poolPreparedStatements}")
	    private boolean poolPreparedStatements;
	    
	    @Value("${spring.datasource.maxPoolPreparedStatementPerConnectionSize}")
	    private int maxPoolPreparedStatementPerConnectionSize;
	    
	    @Value("${spring.datasource.filters}")
	    private String filters;
	    
	    @Value("{spring.datasource.connectionProperties}")
	    private String connectionProperties;
	    @Bean     //声明其为Bean实例
	    @Primary  //在同样的DataSource中，首先使用被标注的DataSource
	    public DataSource dataSource(){
	    	DruidDataSource datasource = new DruidDataSource();
	    	
	    	datasource.setUrl(this.dbUrl);
	    	datasource.setUsername(username);
	    	datasource.setPassword(password);
	    	datasource.setDriverClassName(driverClassName);
	    	
	    	//configuration
	    	datasource.setInitialSize(initialSize);
	    	datasource.setMinIdle(minIdle);
	    	datasource.setMaxActive(maxActive);
	    	datasource.setMaxWait(maxWait);
	    	datasource.setTimeBetweenEvictionRunsMillis(timeBetweenEvictionRunsMillis);
	    	datasource.setMinEvictableIdleTimeMillis(minEvictableIdleTimeMillis);
	    	datasource.setValidationQuery(validationQuery);
	    	datasource.setTestWhileIdle(testWhileIdle);
	    	datasource.setTestOnBorrow(testOnBorrow);
	    	datasource.setTestOnReturn(testOnReturn);
	    	datasource.setPoolPreparedStatements(poolPreparedStatements);
	    	datasource.setMaxPoolPreparedStatementPerConnectionSize(maxPoolPreparedStatementPerConnectionSize);
	    	/*try {
				datasource.setFilters(filters);
			} catch (SQLException e) {
				logger.error("druid configuration initialization filter", e);
			}*/
	    	datasource.setConnectionProperties(connectionProperties);
	    	
	    	return datasource;
	    }
		@Bean
		public ServletRegistrationBean druidStatViewServlet() {
			ServletRegistrationBean registrationBean = new ServletRegistrationBean(new StatViewServlet(), "/druid/*");
			registrationBean.addInitParameter("allow", "127.0.0.1");// IP白名单
																	// (没有配置或者为空，则允许所有访问)
			registrationBean.addInitParameter("deny", "");// IP黑名单
															// (存在共同时，deny优先于allow)
			registrationBean.addInitParameter("loginUsername", "admin");
			registrationBean.addInitParameter("loginPassword", "admin");
			registrationBean.addInitParameter("resetEnable", "false");
			return registrationBean;
		}
	
		@Bean
		public FilterRegistrationBean druidWebStatViewFilter() {
			FilterRegistrationBean registrationBean = new FilterRegistrationBean(new WebStatFilter());
			registrationBean.addInitParameter("urlPatterns", "/*");
			registrationBean.addInitParameter("exclusions", "*.js,*.gif,*.jpg,*.bmp,*.png,*.css,*.ico,/druid/*");
			return registrationBean;
		}
	
}
